I am trying to build a map using slamgmapping. The maps are getting generated. But the generated maps were nowhere near to the original environment. They looks strange and weird. The edges of the map have a saw-tooth structure. (I have the bag file and map, but not able to attach it here) Please find below the tf tree : map -->odom -->baselink -->base_platform --> laser

Following are the launch files used :

launch_robot.launch
<!--Base platform is 7.5 cm off of ground!-->

build_map.launch

(tried with/without this attribute, tried values 0,50,100,etc.)

I am not seeing any exception while running slam_gmapping node. Is this an issue with slam mapping? Could you please help me in figuring out where I am going wrong ?